This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 60 |
| 3 | 1512 |
| 4 | 83520 |
| 5 | 8869680 |
| 6 | 1621680480 |
| 7 | 472907393280 |
| 8 | 207307564531200 |
| 9 | 130417226086775040 |
| 10 | 113438068529746060800 |
| 11 | 132325125941706622848000 |
| 12 | 201817805274824171102208000 |